/Engine/Plugins/Runtime/GeometryCache/Source/GeometryCache/Classes/GeometryCacheMeshData.h
Stores per-batch data used for rendering
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FGeometryCacheMeshBatchInfo
uint32
MaterialIndex
Indexto Material used to draw this batch
uint32
NumTriangles
Total number of Triangles to draw
uint32
StartIndex
Starting index into IndexBuffer to draw from